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arXiv · 1912.09199

Black holes in self-tuning cubic Horndeski cosmology

William T. Emond·Antoine Lehébel·Paul M. Saffin
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Abstract

Observations of neutron star mergers in the late Universe have given significant restrictions to the class of viable scalar-tensor theories. In this paper we construct black holes within the "self-tuning" class of this restricted set, whereby the bare cosmological constant is absorbed by the dynamics of the scalar, giving a lower effective cosmological constant. We use analytic expansions at the singularity, black hole and cosmological horizon, and asymptotic region, coupled with numerical solutions, to find well-behaved black holes that asymptote to the self-tuned de Sitter geometry. The geometry differs from standard general relativity black holes near the horizon, and the scalar field velocity provides a hair for the black holes.

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William T. Emond, Antoine Lehébel, Paul M. Saffin. 2019-12-19. Black holes in self-tuning cubic Horndeski cosmology. https://doi.org/10.1103/physrevd.101.084008

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